A wall used for applying horizontal forces. The wall, which consists of precast concrete blocks, is 1.6-m deep, 0.8-m wide and 1.2-m high. A system comprising 12 modules allows walls to be formed up to a height of 3.6 m and with a variable width.
It is equipped with two hydraulic servo pistons with dynamic functionality to apply forces. The compression and traction workloads of one piston are 250 kN and 160 kN, respectively; those of the other piston are 350 kN and 250 kN, respectively.